An open air vortex side suction and exhaust device
An exhaust device and an open technology, applied in the field of open air vortex side suction and exhaust devices, can solve the problems of reduced collection efficiency increase rate, susceptibility to cross wind interference, poor economy, etc.
Active Publication Date: 2019-07-05
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
This situation leads to the shortcomings of traditional side suction exhaust hoods such as short control distance, small control range, and easy to be disturbed by cross winds, so the collection efficiency is not high
If you want to improve the collection efficiency, you must increase the exhaust air volume, which will inevitably increase the energy consumption; at the same time, with the increase of the exhaust air volume, the increase rate of the collection efficiency of the side suction exhaust hood gradually decreases, resulting in an economical bad sex
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[0046] In order to verify the control and capture effect of this device on pollutants, a numerical model model was established according to the actual use conditions. The size of the fixed table was set to be 1500×1200×500mm in length×width×height, and the size of the back plate was 1500×1200mm. The diameter of the air hole is set to 0.2m, the diameter of each air supply hole on the air supply pipe is set to 0.05m, the exhaust air speed is 7m / s, and the air supply speed is 2m / s. The release speed of pollutants in the air outlet is set to 0.1m / s. By analyzing the speed, the effectiveness of the device of the present invention is further verified.
[0047] The gas flow near the exhaust device of the present invention is basically a low-speed flow with a Mach number less than 0.3, so the air can be regarded as an incompressible fluid; at the same time, the air temperature difference is small, that is, the density changes less, so it can be considered that the indoor air flow conf...
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The invention discloses an open type air vortex side suction and exhaust device, which comprises a fixed platform, the fixed platform is provided with an air exhaust port, and a plurality of air supply pipes are distributed around the air exhaust port on the fixed platform , wherein: in the plurality of air supply pipes, each air supply pipe is provided with an air supply hole, and the orientation of the air supply holes on different air supply pipes is different; the movable installation on the fixed platform There is a backboard, and an exhaust hole is arranged on the backboard, and the exhaust hole is connected with an exhaust device through an exhaust pipe. The structure of the device of the present invention can form a curved columnar air vortex on the upper part of the air outlet during air supply, resulting in a strong negative pressure gradient and airflow rising speed, and transport the pollutants generated in the air outlet to the exhaust hole through the air vortex Discharge at the place, prevent pollutants from escaping, and greatly improve the capture efficiency of the side suction and exhaust system.
Description
technical field [0001] The invention relates to a ventilation device, in particular to an open air vortex side suction and exhaust device. Background technique [0002] A large amount of polluting gas, smoke, steam and other harmful substances are often produced in industrial production, which seriously threatens product quality, production safety and workers' health. Therefore, it is necessary to use a local exhaust hood at the location where the pollutants are emitted to capture and control the pollutants emitted from the pollution source. In the production process, activities such as lifting, feeding, stirring, and observation need to be performed on the upper part of many locations that emit pollution sources, so in many cases it is not possible to install a top-suction exhaust hood. In order to capture the pollutants emitted by these pollution sources in time, side-suction exhaust hoods are often used. For example, in the foundry industry, side-suction exhaust hoods ar...
Claims
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IPC IPC(8): F24F7/08F24F13/04F24F5/00F04D29/00F04D29/40
CPCF04D29/002F04D29/403
Inventor 王怡曹智翔翟超王萌黄艳秋
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY